ML24011A317

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Submittal of Discharge Monitoring Report (Dmr), September 2023
ML24011A317
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 01/11/2024
From: Markum T
Tennessee Valley Authority
To:
Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML24011A315 List:
References
Download: ML24011A317 (1)
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Text

Tennessee Valley Authority, Sequoyah Nuclear Plant, P.O. Box 2000, Soddy Daisy, TN 37384 January 11, 2024 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001

Subject:

Sequoyah Nuclear Plant, Discharge Monitoring Report (DMR), September 2023 Attached is the September 2023 DMR for Sequoyah Nuclear Plant.

Respectfully, Travis R. Markum Environmental Scientist

DMR Copy of Record Permit Permit #:

TN0026450 Permittee:

Tennessee Valley Authority (TVA)

Facility:

TVA SEQUOYAH NUCLEAR PLANT (SQN)

Major:

Yes Permittee Address:

1101 Market Street, BR 2C Chattanoga, TN 37402 Facility Location:

SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature:

101 External Outfall Discharge:

101-G (no description)

Report Dates & Status Monitoring Period:

From 09/01/23 to 09/30/23 DMR Due Date:

10/15/23 Status:

NetDMR Validated Considerations for Form Completion Primary discharge from Diffuser Pond.

Principal Executive Officer First Name:

Thomas

Title:

Vice President Telephone:

423-843-7001 Last Name:

Marshall No Data Indicator (NODI)

Form NODI:

Parameter Monitoring Location Season Param.

NODI Quantity or Loading Quality or Concentration

  1. of Ex.

Frequency of Analysis Sample Type Code Name Qualifier 1

Value 1 Qualifier 2

Value 2 Units Qualifier 1

Value 1 Qualifier 2

Value 2

Qualifier 3

Value 3 Units 00010 Temperature, water deg. centigrade 1 - Effluent Gross 0

Sample

=

42.0 04 - deg C

99/99 - Continuous RC - Recorder (auto)

Permit Req.

Req Mon DAILY MX 04 - deg C

99/99 - Continuous RC - Recorder (auto)

Value NODI 00010 Temperature, water deg. centigrade Z - Instream Monitoring 0

Sample

=

29.4 04 - deg C

99/99 - Continuous CA - CALCTD Permit Req.

<=

30.5 DAILY MX 04 - deg C

99/99 - Continuous CA - CALCTD Value NODI 00016 Temp. diff. between samp. & upstrm deg. C 1 - Effluent Gross 1

Sample

=

2.1 04 - deg C

99/99 - Continuous CA - CALCTD Permit Req.

<=

3.0 DAILY MX 04 - deg C

99/99 - Continuous CA - CALCTD Value NODI 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0

Sample

=

1771.8

=

1782.8 03 - MGD 99/99 - Continuous RC - Recorder (auto)

Permit Req.

Req Mon MO AVG Req Mon DAILY MX 03 - MGD 99/99 - Continuous RC - Recorder (auto)

Value NODI 50060 Chlorine, total residual 1 - Effluent Gross 0

Sample Permit Req.

<=

0.027 MO AVG

<=

0.047 DAILY MX 19 -

mg/L 01/07 - Weekly GR - GRAB Value NODI B - Below Detection Limit/No Detection B - Below Detection Limit/No Detection 82234 Temperature rate of change deg. C/hr Z - Instream Monitoring 0

Sample

=

0.0 62 - deg C/hr 99/99 - Continuous CA - CALCTD Permit Req.

<=

2.0 DAILY MX 62 - deg C/hr 99/99 - Continuous CA - CALCTD Value NODI TRP3B IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia 1 - Effluent Gross 0

Sample 100.0 23 - %

01/30 - Monthly CP - COMPOS Permit Req.

69.0 MINIMUM 23 - %

01/30 - Monthly CP - COMPOS Value NODI TRP6C IC25 Static Renewal 7 Day Chronic Chrpimephales 1 - Effluent Gross 0

Sample 100.0 23 - %

01/30 - Monthly CP - COMPOS Permit Req.

69.0 MINIMUM 23 - %

01/30 - Monthly CP - COMPOS Value NODI Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type.

Edit Check Errors

No errors.

Comments Method Detection Limit for Total Residual Chlorine is 0.05 mg/L.

Attachments Name Type Size SQN_101_Sep_2023_WET_Compliance_Report.pdf pdf 7570865.0 Report Last Saved By Tennessee Valley Authority (TVA)

User:

TRMARKUM Name:

Travis Markum E-Mail:

trmarkum@tva.gov Date/Time:

2023-10-10 13:16 (Time Zone: -05:00)

Report Last Signed By User:

TMCMUTUA Name:

Tony McMutuary E-Mail:

tmcmutuary@tva.gov Date/Time:

2023-10-12 05:50 (Time Zone: -05:00)

TENNESSEE VALLEY AUTHORITY TOXICITY TEST REPORT INTRODUCTION / EXECUTIVE

SUMMARY

Report Date: September 27, 2023

1. Facility / Discharger: Sequoyah Nuclear Plant / TVA
2. County / State: Hamilton / Tennessee
3. NPDES Permit #: TN0026450
4. Type of Facility: Nuclear-Fueled Electric Generating Plant
5. Design Flow (MGD): 1,579
6. Receiving Stream: Tennessee River (TRM 483.6)
7. 1Q10: 2,456
8. Outfall Tested: 101
9. Dates Sampled: September 10 - 15, 2023
10. Average Flow on Days Sampled (MGD): 1764.032, 1766.694, 1763.495
11. Pertinent Site Conditions: Production / operation data will be provided upon request.
12. Test Dates: September 12 - 19, 2023
13. Test Type: Short-term Chronic Definitive
14. Test Species: Fathead Minnows (Pimephales promelas)

Daphnids (Ceriodaphnia dubia)

15. Concentrations Tested (%):

Pimephales promelas: UV treated Outfall 101: 17.25, 34.5, 69, 84.5, 100 UV treated Intake: 100 Ceriodaphnia dubia: Non-treated Outfall 101: 17.25, 34.5, 69, 84.5, 100 Non-treated Intake: 100

16. Permit Limit Endpoint (%): Outfall 101: IC25 = 69%

Page 1 of 91

17. Test Results: Outfall 101: Pimephales promelas: IC25 > 100%

Ceriodaphnia dubia: IC25 > 100%

18. Facility

Contact:

Travis Markum Phone #: (865) 748-3294

19. Consulting / Testing Lab: Environmental Testing Solutions, Inc.
20. Lab

Contact:

Jim Sumner Phone #: (828) 350-9364

21. TVA

Contact:

Rick Sherrard Phone #: (423) 987-2250

22. Notes: Exposures to samples collected September 10 - 15, 2023 from Outfall 101 resulted in no toxic effects to fathead minnows or daphnids. The resulting IC25 values, for both species, were >100 percent. Exposure of minnows and daphnids to intake samples resulted in no significant differences from the controls during this study period.

Page 2 of 91

METHODS

SUMMARY

Samples:

1. Sampling Point: Outfall 101, Intake
2. Sample Type: Composite
3. Sample Information:

Sample ID Date (MM-DD-YY)

Time (ET)

Collected Date (MM-DD-YY)

Time (ET)

Received Arrival Temp.

(°C)

Initial TRC*

(mg/L)

Date (MM-DD-YY)

Time (ET)

Last Used By 101 09-10-23 / 0700 to 09-11-23 / 0600 09-11-23 / 1336 1.7

<0.10 09-12-23 / 0817 09-13-23 / 0753 Intake 09-10-23 / 0700 to 09-11-23 / 0600 09-11-23 / 1336 1.5

<0.10 09-12-23 / 0817 09-13-23 / 0753 101 09-12-23 / 0700 to 09-13-23 / 0600 09-13-23 / 1315 1.7

<0.10 09-14-23 / 0757 09-15-23 / 0755 Intake 09-12-23 / 0700 to 09-13-23 / 0600 09-13-23 / 1315 3.5

<0.10 09-14-23 / 0757 09-15-23 / 0755 101 09-14-23 / 0700 to 09-15-23 / 0600 09-15-23 / 1203 2.7, 2.7

<0.10 09-16-23 / 0853 09-17-23 / 0744 09-18-23 / 0742 Intake 09-14-23 / 0700 to 09-15-23 / 0600 09-15-23 / 1203 2.8

<0.10 09-16-23 / 0853 09-17-23 / 0744 09-18-23 / 0742

  • TRC = Total Residual Chlorine Samples were collected in two 2.5 gallon cubitainers. Temperature was measured in each cubitainer upon arrival.
4. Sample Manipulation: Samples from Outfall 101 and intake were warmed to test temperature (25.0 +/- 1.0oC) in a warm water bath.

Aliquots of Outfall 101 and Intake samples were UV-treated through a 40-watt Smart UV Sterilizer (manufactured by Emperor Aquatics, Inc.) for 2 minutes.

Page 3 of 91

Pimephales promelas Ceriodaphnia dubia Test Organisms:

1. Source:

In-house Cultures In-house Cultures

2. Age:

< 24-hours old

< 24-hours old Test Method Summary:

1. Test Conditions:

Static, Renewal Static, Renewal

2. Test Duration:

7 days Until at least 60% of control females have 3 broods

3. Control / Dilution Water: Moderately Hard Synthetic Moderately Hard Synthetic
4. Number of Replicates:

4 10

5. Organisms per Replicate: 10 1
6. Test Initiation: (Date/Time): 09-12-23 0736 ET 09-12-23 0817 ET
7. Test Termination: (Date/Time): 09-19-23 0550 ET 09-19-23 0623 ET
8. Test Temperature: Outfall 101: Mean = 24.7oC Mean = 25.0oC (24.2 - 25.0oC)

(24.7 - 25.3oC)

9. Physical / Chemical Measurements:

Alkalinity, hardness, total residual chlorine, and conductivity were measured at the laboratory in each 100% sample. Daily temperatures were measured in one replicate for each test concentration. Pre-and post-exposure test solutions were analyzed daily for pH and dissolved oxygen.

10. Statistics:

Statistics were performed according to methods prescribed by EPA using ToxCalc version 5.0 statistical software (Tidepool Scientific Software, McKinneyville, CA).

Page 4 of 91

TOXICITY TEST RESULTS (see Appendix C for Bench Sheets)

1.

Results of a Pimephales promelas Chronic/ 7-day Toxicity Test.

(Genus species)

(Type / Duration)

Conducted September 12 - 19, 2023 using effluent from Outfall 101.

Test Solutions

(% Effluent)

Percent Surviving (time interval used - days) 1 2

3 4

5 6

7 Control, UV-treated 100 100 100 100 100 100 100 17.25%

100 100 100 100 100 100 100 34.5%

100 100 100 100 100 100 100 69%

100 100 100 100 100 100 100 84.5%

100 100 100 100 100 100 100 100.0%

100 100 100 100 100 100 100 Intake 100 100 100 100 100 100 100

Control, Non-treated 100 100 100 100 100 100 100 Test Solutions

(% Effluent)

Mean Dry Weight (mg)

(replicate number) 1 2

3 4

Mean Control, UV-treated 0.668 0.740 0.724 0.758 0.723 17.25%

0.761 0.827 0.773 0.733 0.764 34.5%

0.769 0.737 0.815 0.742 0.766 69%

0.788 0.868 0.759 0.863 0.820 84.5%

0.885 0.818 0.846 0.762 0.828 100.0%

0.888 0.842 0.700 0.816 0.812 Intake 0.769 0.786 0.826 0.835 0.804 Control, Non-treated 0.894 0.787 0.886 0.745 0.828 IC25 Value: > 100%

Permit Limit: 69%

95% Confidence Limits:

Upper Limit: NA Lower Limit: NA Calculated TU Estimates: < 1.0 TUc*

Permit Limit: 1.4 TUc

  • TUa = 100/LC50: TUc = 100/ IC25 Page 5 of 91

TOXICITY TEST RESULTS (see Appendix C for Bench Sheets)

2.

Results of a Ceriodaphnia dubia Chronic/ 7-day Toxicity Test.

(Genus species)

(Type / Duration)

Conducted September 12 - 19, 2023 using effluent from Outfall 101.

Test Solutions

(% Effluent)

Percent Surviving (time interval used - days) 1 2

3 4

5 6

7 Control 100 100 100 100 100 100 100 17.25%

100 100 100 100 100 100 100 34.5%

100 100 100 100 100 100 100 69%

100 100 100 100 100 100 100 84.5%

100 100 100 100 100 100 100 100.0%

100 100 100 100 100 100 100 Test Solutions

(% Effluent)

Reproduction (#young/female/7 days)

Data (replicate number) 1 2

3 4

5 6

7 8

9 10 Mean Control 31 33 33 34 33 31 32 32 33 30 32.2 17.25%

33 38 33 31 33 29 34 36 34 34 33.5 34.5%

34 37 32 36 32 37 37 35 35 32 34.7 69%

32 38 36 35 35 36 38 33 35 37 35.5 84.5%

38 37 37 38 37 33 37 33 32 39 36.1 100.0%

35 36 39 35 39 36 37 36 36 39 36.8 IC25 Value: > 100%

Permit Limit: 69%

95% Confidence Limits:

Upper Limit: NA Lower Limit: NA Calculated TU Estimates: < 1.0 TUc*

Permit Limit: 1.4 TUc

  • TUa = 100/LC50: TUc = 100/ IC25 Page 6 of 91

TOXICITY TEST RESULTS (see Appendix C for Bench Sheets) 2.

Results of a Ceriodaphnia dubia Chronic/ 7-day Toxicity Test.

(Genus species)

(Type / Duration)

Conducted September 12 - 19, 2023 using water from Intake Test Solutions

(% Effluent)

Percent Surviving (time interval used - days) 1 2

3 4

5 6

7 Control 100 100 100 100 100 100 100 Intake 100 100 100 100 100 100 100 Test Solutions

(% Effluent)

Reproduction (#young/female/7 days)

Data (replicate number) 1 2

3 4

5 6

7 8

9 10 Mean Control 33 28 32 31 28 33 31 31 31 29 30.7 Intake 33 31 39 31 31 33 37 34 30 33 33.2 IC25 Value: > 100%

Permit Limit: N/A 95% Confidence Limits:

Upper Limit: NA Lower Limit: NA Calculated TU Estimates: < 1.0 TUc*

Permit Limit: N/A

  • TUa = 100/LC50: TUc = 100/ IC25 REFERENCE TOXICANT TEST RESULTS (see Appendix A and D)

Species Date Time Duration Toxicant Results (IC25)

Pimephales promelas September 12 - 19, 2023 0715 7 days KCl 0.61 g/L Ceriodaphnia dubia September 12 - 19, 2023 0805 7 days NaCl 1.08 g/L Page 7 of 91

24.6 - 24.8 24.3 - 24.6 7.7 8.0 5.3 7.9 7.78 - 7.95 7.19 - 7.79 288 313 60 62 85 87 24.7 - 24.8 24.3 - 24.7 7.6 8.0 5.8 7.9 7.70 - 7.91 7.26 - 7.78 288 317 59 63 87 89 24.7 - 24.9 24.2 - 24.8 7.7 8.0 5.7 7.8 7.73 - 7.92 7.23 - 7.77 264 293 24.7 - 24.9 24.4 - 24.7 7.7 8.0 5.6 7.8 7.73 - 7.92 7.23 - 7.76 240 264 24.7 - 25.0 24.3 - 24.7 7.7 8.0 5.6 7.8 7.73 - 7.91 7.23 - 7.72 196 215 24.7 - 25.0 24.3 - 24.7 7.8 8.0 5.6 7.8 7.73 - 7.89 7.26 - 7.75 172 283 24.8 - 25.0 24.3 - 24.7 7.7 8.0 5.2 7.9 7.72 - 7.89 7.22 - 7.76 148 159 58 62 59 61

< 0.10

< 0.10 24.8 - 25.0 24.4 - 24.7 7.8 8.1 5.6 8.0 7.71 - 7.89 7.13 - 7.79 146 160 58 62 59 59

< 0.10

< 0.10 24.7 - 24.9 25.0 - 25.3 7.7 8.0 7.8 8.0 7.78 - 7.95 7.79 - 8.00 288 313 60 62 85 87 24.7 - 25.0 24.8 - 25.3 7.6 8.0 7.7 8.0 7.82 - 7.98 7.79 - 7.97 269 290 24.8 - 25.0 24.9 - 25.2 7.6 8.0 7.7 8.1 7.81 - 7.98 7.78 - 7.96 246 264 24.8 - 25.0 24.9 - 25.2 7.7 8.0 7.7 8.0 7.79 - 7.96 7.76 - 7.95 201 212 24.8 - 25.0 24.7 - 25.2 7.7 8.0 7.7 8.1 7.77 - 7.93 7.74 - 7.93 169 187 24.9 - 25.0 24.8 - 25.2 7.8 8.0 7.7 8.1 7.76 - 7.91 7.74 - 7.93 149 161 58 62 59 61

< 0.10

< 0.10 24.8 - 25.0 24.7 - 25.2 7.8 8.1 7.7 8.2 7.75 - 7.90 7.74 - 7.91 148 157 56 60 57 61

< 0.10

< 0.10

  • Note: Total residual chlorine was performed on non-treated Outfall 101 and Intake samples.

Overall temperature (oC)

Pimephales promelas Ceriodaphnia dubia

< 0.10 86 61 60 7.1 7.80 7.59 88 7.55 7.57 7.9 7.83 7.90 206 61 59 62 Final (mhos/cm) 25.0 24.7 25.3 Average Minimum Maximum 24.7 24.2 25.0 7.64 7.2 7.78 206 7.8 7.8 305 24.5 24.6 Pimephales promelas PHYSICAL/CHEMICAL

SUMMARY

performed September 12-19, 2023.

Test Sample ID Temperature (oC)

Dissolved Oxygen (mg/L)

Alkalinity Hardness

  • Total Residual Chlorine (mg/L) pH (S.U.)

Conductance Initial Final Initial Final Initial Water Chemistry Mean Values and Ranges for UV-treated Pimephales promelas and Non-treated Ceriodaphnia dubia, Sequoyah Nuclear Plant (SQN), Effluent Outfall 101 and Intake (mg/L CaCO3) (mg/L CaCO3) 60

< 0.10 17.25%

24.8 24.6 7.8 7.1 7.80 7.60 280 7.0 7.83 7.8 7.61 301 61 86 24.5 24.5 24.7 Control, Non-treated 254 7.9 7.0 7.78 7.8 153 8.0 7.0 7.78 7.9 7.0 7.79 7.9 7.0 7.78 155 7.56 7.57 194 60

< 0.10 59 Ceriodaphnia dubia 24.9 25.0 154 7.9 7.83 7.84 7.86 7.87 25.0 7.9 7.86 25.1 7.8 7.9 24.9 84.5%

180 7.8 7.9 7.85

< 0.10 Intake 25.0 24.9 24.9 59 7.9 7.85 59 155 25.0 25.0 7.9 7.83 100%

69%

254 7.89 7.88 7.9 7.8 34.5%

24.6 25.0 Intake 24.9 100%

280 7.90 7.88 7.9 7.8 25.0 24.8 17.25%

301 25.1 24.8 Control, Non-treated 24.9 84.5%

24.5 24.9 69%

24.6 24.8 34.5%

Control, UV-treated 24.7 Page 8 of 91

SUMMARY

/ CONCLUSIONS Exposures to samples collected September 10 - 15, 2023 from Outfall 101 resulted in no toxic effects to fathead minnows or daphnids. The resulting IC25 values, for both species, were >100 percent. Exposure of minnows and daphnids to intake samples resulted in no significant differences from the controls during this study period.

Page 9 of 91

DMR Copy of Record Permit Permit #:

TN0026450 Permittee:

Tennessee Valley Authority (TVA)

Facility:

TVA SEQUOYAH NUCLEAR PLANT (SQN)

Major:

Yes Permittee Address:

1101 Market Street, BR 2C Chattanoga, TN 37402 Facility Location:

SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature:

103 Internal Outfall Discharge:

103-G (no description)

Report Dates & Status Monitoring Period:

From 09/01/23 to 09/30/23 DMR Due Date:

10/15/23 Status:

NetDMR Validated Considerations for Form Completion Internal Monitoring Point for various flows from Low Volume Waste Treatment Pond to Diffuser Pond, which eventually discharges through Outfall 101.

Principal Executive Officer First Name:

Thomas

Title:

Vice President Telephone:

423-843-7001 Last Name:

Marshall No Data Indicator (NODI)

Form NODI:

Parameter Monitoring Location Season # Param. NODI Quantity or Loading Quality or Concentration

  1. of Ex. Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 00400 pH IM - Internal Monitoring Point 0

Sample

=

6.8

=

6.8 12 - SU 01/30 - Monthly GR - GRAB Permit Req.

>=

6.0 MINIMUM

<=

9.0 MAXIMUM 12 - SU 01/30 - Monthly GR - GRAB Value NODI 00530 Solids, total suspended IM - Internal Monitoring Point 0

Sample

=

12.6

=

12.6 19 - mg/L 01/30 - Monthly GR - GRAB Permit Req.

<=

30.0 MO AVG <=

100.0 DAILY MX 19 - mg/L 01/30 - Monthly GR - GRAB Value NODI 00556 Oil & Grease IM - Internal Monitoring Point 0

Sample 4.8 4.8 19 - mg/L 01/30 - Monthly GR - GRAB Permit Req.

<=

15.0 MO AVG <=

20.0 DAILY MX 19 - mg/L 01/30 - Monthly GR - GRAB Value NODI 50050 Flow, in conduit or thru treatment plant IM - Internal Monitoring Point 0

Sample

=

0.718

=

0.718 03 - MGD 01/30 - Monthly IN - INSTAN Permit Req.

Req Mon MO AVG Req Mon DAILY MX 03 - MGD 01/30 - Monthly IN - INSTAN Value NODI Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type.

Edit Check Errors No errors.

Comments Attachments No attachments.

Report Last Saved By Tennessee Valley Authority (TVA)

User:

TRMARKUM Name:

Travis Markum E-Mail:

trmarkum@tva.gov Date/Time:

2023-10-10 13:08 (Time Zone: -05:00)

Report Last Signed By User:

TMCMUTUA Name:

Tony McMutuary E-Mail:

tmcmutuary@tva.gov Date/Time:

2023-10-12 05:50 (Time Zone: -05:00)

DMR Copy of Record Permit Permit #:

TN0026450 Permittee:

Tennessee Valley Authority (TVA)

Facility:

TVA SEQUOYAH NUCLEAR PLANT (SQN)

Major:

Yes Permittee Address:

1101 Market Street, BR 2C Chattanoga, TN 37402 Facility Location:

SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature:

107 Internal Outfall Discharge:

107-G (no description)

Report Dates & Status Monitoring Period:

From 09/01/23 to 09/30/23 DMR Due Date:

10/15/23 Status:

NetDMR Validated Considerations for Form Completion Metal Cleaning Waste Pond discharge. No monitoring required for stormwater decanting. Daily monitoring required only during dewatering events.

Principal Executive Officer First Name:

Thomas

Title:

Vice President Telephone:

423-843-7001 Last Name:

Marshall No Data Indicator (NODI)

Form NODI:

Parameter Monitoring Location Season # Param. NODI Quantity or Loading Quality or Concentration

  1. of Ex. Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 00400 pH IM - Internal Monitoring Point 0

Sample Permit Req.

>=

6.0 MINIMUM

<=

9.0 MAXIMUM 12 - SU 01/01 - Daily GR - GRAB Value NODI C - No Discharge C - No Discharge 00530 Solids, total suspended IM - Internal Monitoring Point 0

Sample Permit Req.

<=

30.0 MO AVG

<=

100.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS Value NODI C - No Discharge C - No Discharge 00556 Oil & Grease IM - Internal Monitoring Point 0

Sample Permit Req.

<=

15.0 MO AVG

<=

20.0 DAILY MX 19 - mg/L 01/01 - Daily GR - GRAB Value NODI C - No Discharge C - No Discharge 01042 Copper, total [as Cu]

IM - Internal Monitoring Point 0

Sample Permit Req.

<=

1.0 MO AVG

<=

1.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS Value NODI C - No Discharge C - No Discharge 01045 Iron, total [as Fe]

IM - Internal Monitoring Point 0

Sample Permit Req.

<=

1.0 MO AVG

<=

1.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS Value NODI C - No Discharge C - No Discharge Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type.

Edit Check Errors No errors.

Comments Attachments No attachments.

Report Last Saved By Tennessee Valley Authority (TVA)

User:

TRMARKUM Name:

Travis Markum E-Mail:

trmarkum@tva.gov Date/Time:

2023-10-10 12:58 (Time Zone: -05:00)

Report Last Signed By User:

TMCMUTUA Name:

Tony McMutuary E-Mail:

tmcmutuary@tva.gov Date/Time:

2023-10-12 05:50 (Time Zone: -05:00)

DMR Copy of Record Permit Permit #:

TN0026450 Permittee:

Tennessee Valley Authority (TVA)

Facility:

TVA SEQUOYAH NUCLEAR PLANT (SQN)

Major:

Yes Permittee Address:

1101 Market Street, BR 2C Chattanoga, TN 37402 Facility Location:

SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature:

110 External Outfall Discharge:

110-G (no description)

Report Dates & Status Monitoring Period:

From 09/01/23 to 09/30/23 DMR Due Date:

10/15/23 Status:

NetDMR Validated Considerations for Form Completion Outfall 110 is closed. Only active in the event the plant goes into closed mode.

Principal Executive Officer First Name:

Thomas

Title:

Vice President Telephone:

423-843-7001 Last Name:

Marshall No Data Indicator (NODI)

Form NODI:

Parameter Monitoring Location Season Param.

NODI Quantity or Loading Quality or Concentration

  1. of Ex.

Frequency of Analysis Sample Type Code Name Qualifier 1

Value 1 Qualifier 2

Value 2 Units Qualifier 1

Value 1 Qualifier 2

Value 2

Qualifier 3

Value 3 Units 00010 Temperature, water deg. centigrade 1 - Effluent Gross 0

Sample Permit Req.

Req Mon DAILY MX 04 - deg C

99/99 - Continuous CA - CALCTD Value NODI C - No Discharge 00010 Temperature, water deg. centigrade Z - Instream Monitoring 0

Sample Permit Req.

<=

30.5 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD Value NODI C - No Discharge 00016 Temp. diff. between samp. & upstrm deg. C 1 - Effluent Gross 1

Sample Permit Req.

<=

3.0 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD Value NODI C - No Discharge 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0

Sample Permit Req.

Req Mon MO AVG Req Mon DAILY MX 03 - MGD 99/99 - Continuous RC - Recorder (auto)

Value NODI C - No Discharge C - No Discharge 50060 Chlorine, total residual 1 - Effluent Gross 0

Sample Permit Req.

<=

0.027 MO AVG

<=

0.047 DAILY MX 19 - mg/L 05/WK - Five Per Week GR - GRAB Value NODI C - No Discharge C - No Discharge 82234 Temperature rate of change deg. C/hr Z - Instream Monitoring 0

Sample Permit Req.

<=

30.5 DAILY MX 62 - deg C/hr 99/99 - Continuous CA - CALCTD Value NODI C - No Discharge TRP3B IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia 1 - Effluent Gross 0

Sample Permit Req.

>=

69.0 MINIMUM 23 - %

01/30 - Monthly GR - GRAB Value NODI C - No Discharge TRP6C IC25 Static Renewal 7 Day Chronic Chrpimephales 1 - Effluent Gross 0

Sample Permit Req.

>=

69.0 MINIMUM 23 - %

01/30 - Monthly GR - GRAB Value NODI C - No Discharge Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type.

Edit Check Errors

No errors.

Comments Attachments No attachments.

Report Last Saved By Tennessee Valley Authority (TVA)

User:

TRMARKUM Name:

Travis Markum E-Mail:

trmarkum@tva.gov Date/Time:

2023-10-10 13:02 (Time Zone: -05:00)

Report Last Signed By User:

TMCMUTUA Name:

Tony McMutuary E-Mail:

tmcmutuary@tva.gov Date/Time:

2023-10-12 05:50 (Time Zone: -05:00)

DMR Copy of Record Permit Permit #:

TN0026450 Permittee:

Tennessee Valley Authority (TVA)

Facility:

TVA SEQUOYAH NUCLEAR PLANT (SQN)

Major:

Yes Permittee Address:

1101 Market Street, BR 2C Chattanoga, TN 37402 Facility Location:

SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature:

118 External Outfall Discharge:

118-G (no description)

Report Dates & Status Monitoring Period:

From 09/01/23 to 09/30/23 DMR Due Date:

10/15/23 Status:

NetDMR Validated Considerations for Form Completion Principal Executive Officer First Name:

Thomas

Title:

Vice President Telephone:

423-843-7001 Last Name:

Marshall No Data Indicator (NODI)

Form NODI:

Parameter Monitoring Location Season # Param. NODI Quantity or Loading Quality or Concentration

  1. of Ex.

Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 00300 Oxygen, dissolved [DO]

1 - Effluent Gross 0

Sample Permit Req.

>=

2.0 MINIMUM 19 - mg/L 02/07 - Twice Every Week GR - GRAB Value NODI C - No Discharge 00530 Solids, total suspended 1 - Effluent Gross 0

Sample Permit Req.

<=

100.0 DAILY MX 19 - mg/L 02/07 - Twice Every Week GR - GRAB Value NODI C - No Discharge 00545 Solids, settleable 1 - Effluent Gross 0

Sample Permit Req.

<=

1.0 DAILY MX 25 - mL/L 01/30 - Monthly GR - GRAB Value NODI C - No Discharge 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0

Sample Permit Req.

Req Mon MO AVG Req Mon DAILY MX 03 - MGD 01/BA - Once Per Batch ES - ESTIMA Value NODI C - No Discharge C - No Discharge Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type.

Edit Check Errors No errors.

Comments Attachments No attachments.

Report Last Saved By Tennessee Valley Authority (TVA)

User:

TRMARKUM Name:

Travis Markum E-Mail:

trmarkum@tva.gov Date/Time:

2023-10-10 13:03 (Time Zone: -05:00)

Report Last Signed By User:

TMCMUTUA Name:

Tony McMutuary E-Mail:

tmcmutuary@tva.gov Date/Time:

2023-10-12 05:50 (Time Zone: -05:00)

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